egui: add widget to control showing bboxes

src/bin/topola-egui/painter.rs

@@ -7,11 +7,20 @@ use topola::{
 pub struct Painter<'a> {
     ui: &'a mut egui::Ui,
     transform: egui::emath::RectTransform,
+    paint_bboxes: bool,
 }
 
 impl<'a> Painter<'a> {
-    pub fn new(ui: &'a mut egui::Ui, transform: egui::emath::RectTransform) -> Self {
-        Self { ui, transform }
+    pub fn new(
+        ui: &'a mut egui::Ui,
+        transform: egui::emath::RectTransform,
+        paint_bboxes: bool,
+    ) -> Self {
+        Self {
+            ui,
+            transform,
+            paint_bboxes,
+        }
     }
 
     pub fn paint_primitive(&mut self, shape: &PrimitiveShape, color: egui::epaint::Color32) {
@@ -49,16 +58,18 @@ impl<'a> Painter<'a> {
 
         self.ui.painter().add(epaint_shape);
 
-        let envelope = AccessPrimitiveShape::envelope(shape, 0.0);
-        let rect = egui::epaint::Rect {
-            min: [envelope.lower()[0] as f32, -envelope.upper()[1] as f32].into(),
-            max: [envelope.upper()[0] as f32, -envelope.lower()[1] as f32].into(),
-        };
-        self.ui.painter().add(egui::Shape::rect_stroke(
-            self.transform.transform_rect(rect),
-            egui::Rounding::ZERO,
-            egui::Stroke::new(1.0, egui::Color32::GRAY),
-        ));
+        if self.paint_bboxes {
+            let bbox = AccessPrimitiveShape::bbox(shape, 0.0);
+            let rect = egui::epaint::Rect {
+                min: [bbox.lower()[0] as f32, -bbox.upper()[1] as f32].into(),
+                max: [bbox.upper()[0] as f32, -bbox.lower()[1] as f32].into(),
+            };
+            self.ui.painter().add(egui::Shape::rect_stroke(
+                self.transform.transform_rect(rect),
+                egui::Rounding::ZERO,
+                egui::Stroke::new(1.0, egui::Color32::GRAY),
+            ));
+        }
     }
 
     pub fn paint_dot(&mut self, circle: Circle, color: egui::epaint::Color32) {

src/bin/topola-egui/top.rs

@@ -22,6 +22,7 @@ pub struct Top {
     pub is_placing_via: bool,
     pub show_ratsnest: bool,
     pub show_navmesh: bool,
+    pub show_bboxes: bool,
 }
 
 impl Top {
@@ -30,6 +31,7 @@ impl Top {
             is_placing_via: false,
             show_ratsnest: false,
             show_navmesh: false,
+            show_bboxes: false,
         }
     }
 
@@ -109,6 +111,7 @@ impl Top {
 
                     ui.toggle_value(&mut self.show_ratsnest, "Show Ratsnest");
                     ui.toggle_value(&mut self.show_navmesh, "Show Navmesh");
+                    ui.toggle_value(&mut self.show_bboxes, "Show Bboxes");
 
                     ui.separator();
 

src/bin/topola-egui/viewport.rs

@@ -70,7 +70,7 @@ impl Viewport {
                     .translate(ctx.input(|i| -i.raw_scroll_delta / new_scale));
 
                 let transform = egui::emath::RectTransform::from_to(self.from_rect, viewport_rect);
-                let mut painter = Painter::new(ui, transform);
+                let mut painter = Painter::new(ui, transform, top.show_bboxes);
 
                 if let Some(ref mut invoker) = maybe_invoker {
                     if ctx.input(|i| i.pointer.any_click()) {

src/geometry/primitive.rs

@@ -14,11 +14,11 @@ pub trait AccessPrimitiveShape: AccessShape {
     fn priority(&self) -> usize;
     fn inflate(&self, margin: f64) -> PrimitiveShape;
     fn intersects(&self, other: &PrimitiveShape) -> bool;
-    fn envelope(&self, margin: f64) -> AABB<[f64; 2]>;
+    fn bbox(&self, margin: f64) -> AABB<[f64; 2]>;
     fn width(&self) -> f64;
 
     fn envelope_3d(&self, margin: f64, layer: usize) -> AABB<[f64; 3]> {
-        let envelope = self.envelope(margin);
+        let envelope = self.bbox(margin);
         AABB::from_corners(
             [envelope.lower()[0], envelope.lower()[1], layer as f64],
             [envelope.upper()[0], envelope.upper()[1], layer as f64],
@@ -26,7 +26,7 @@ pub trait AccessPrimitiveShape: AccessShape {
     }
 
     fn full_height_envelope_3d(&self, margin: f64, layer_count: usize) -> AABB<[f64; 3]> {
-        let envelope = self.envelope(margin);
+        let envelope = self.bbox(margin);
         AABB::from_corners(
             [envelope.lower()[0], envelope.lower()[1], 0.0],
             [
@@ -113,7 +113,7 @@ impl AccessPrimitiveShape for DotShape {
         }
     }
 
-    fn envelope(&self, margin: f64) -> AABB<[f64; 2]> {
+    fn bbox(&self, margin: f64) -> AABB<[f64; 2]> {
         AABB::from_corners(
             [
                 self.circle.pos.x() - self.circle.r - margin,
@@ -215,7 +215,7 @@ impl AccessPrimitiveShape for SegShape {
         }
     }
 
-    fn envelope(&self, margin: f64) -> AABB<[f64; 2]> {
+    fn bbox(&self, margin: f64) -> AABB<[f64; 2]> {
         let points: Vec<[f64; 2]> = self
             .polygon()
             .exterior()
@@ -371,7 +371,7 @@ impl AccessPrimitiveShape for BendShape {
         }
     }
 
-    fn envelope(&self, _margin: f64) -> AABB<[f64; 2]> {
+    fn bbox(&self, _margin: f64) -> AABB<[f64; 2]> {
         let halfwidth = self.inner_circle.r + self.width;
         AABB::from_corners(
             [
@@ -393,6 +393,6 @@ impl AccessPrimitiveShape for BendShape {
 impl RTreeObject for PrimitiveShape {
     type Envelope = AABB<[f64; 2]>;
     fn envelope(&self) -> Self::Envelope {
-        AccessPrimitiveShape::envelope(self, 0.0)
+        AccessPrimitiveShape::bbox(self, 0.0)
     }
 }